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<TITLE>JavaScript Source Code 3000:  Miscellaneous:  Random Image Rotator</TITLE>
<META HTTP-EQUIV="JavaScript Source Code 3000" CONTENT = "no-cache">
<META NAME="date" CONTENT="2000-09-09">
<META NAME="channel" CONTENT="Web Developer">
<META NAME="author" CONTENT="Robert Bui (astrogate@hotmail.com)">
<META NAME="section" CONTENT="Miscellaneous">
<META NAME="description" CONTENT="Rotates a series of images on the page every few seconds.  The images can easily be changed, and the script can be modified to rotate the images randomly or in order.">

<SCRIPT LANGUAGE="JavaScript">
<!-- Original:  Robert Bui (astrogate@hotmail.com) -->
<!-- Web Site:  http://astrogate.virtualave.net -->




<!-- Begin
var interval = 2.5; // delay between rotating images (in seconds)
var random_display = 1; // 0 = no, 1 = yes
interval *= 1000;

var image_index = 0;
image_list = new Array();
image_list[image_index++] = new imageItem("../img/image-cycler/01.jpg");
image_list[image_index++] = new imageItem("../img/image-cycler/02.jpg");
image_list[image_index++] = new imageItem("../img/image-cycler/03.jpg");
image_list[image_index++] = new imageItem("../img/image-cycler/04.jpg");
var number_of_image = image_list.length;
function imageItem(image_location) {
this.image_item = new Image();
this.image_item.src = image_location;
}
function get_ImageItemLocation(imageObj) {
return(imageObj.image_item.src)
}
function generate(x, y) {
var range = y - x + 1;
return Math.floor(Math.random() * range) + x;
}
function getNextImage() {
if (random_display) {
image_index = generate(0, number_of_image-1);
}
else {
image_index = (image_index+1) % number_of_image;
}
var new_image = get_ImageItemLocation(image_list[image_index]);
return(new_image);
}
function rotateImage(place) {
var new_image = getNextImage();
document[place].src = new_image;
var recur_call = "rotateImage('"+place+"')";
setTimeout(recur_call, interval);
}
//  End -->
</script>
</HEAD>

<BODY BGCOLOR=#ffffff vlink=#0000ff OnLoad="rotateImage('rImage')">

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<FONT COLOR="#006666"><b>Random Image Rotator</b></font></font>
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<!-- Description --><!--content_start-->
Rotates a series of images on the page every few seconds.  The images can easily be changed, and the script can be modified to rotate the images randomly or in order.
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<!-- Demonstration -->
<center>
<img name="rImage" src="../img/image-cycler/01.jpg" /img/image-cycler/01.jpg" width=120 height=90>
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<tr><td BGCOLOR=yellow><font FACE="helvetica,arial,geneva"><b>JavaScript Source Code 3000:  Miscellaneous:  Random Image Rotator</b>
<p>Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Apple-s).  The script is yours!!!
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<form NAME="copy">

<DIV align="center">
<input type=button value="Highlight All" onClick="javascript:this.form.txt.focus();this.form.txt.select();">&nbsp;&nbsp;&nbsp;&nbsp;
<INPUT TYPE="text" NAME="total" VALUE="Script Size:  2.29 KB" size=24>
</DIV>

<textarea NAME="txt" ROWS=20 COLS=75 WRAP=VIRTUAL>

&lt;!-- THREE STEPS TO INSTALL RANDOM IMAGE ROTATOR:

  1.  Copy the coding into the HEAD of your HTML document
  2.  Add the onLoad event handler into the BODY tag
  3.  Put the last coding into the BODY of your HTML document  --&gt;

&lt;!-- STEP ONE: Paste this code into the HEAD of your HTML document  --&gt;

&lt;HEAD&gt;

&lt;SCRIPT LANGUAGE="JavaScript"&gt;
&lt;!-- Original:  Robert Bui (astrogate@hotmail.com) --&gt;
&lt;!-- Web Site:  http://astrogate.virtualave.net --&gt;

&lt;! &gt;
&lt;! &gt;

&lt;!-- Begin
var interval = 2.5; // delay between rotating images (in seconds)
var random_display = 1; // 0 = no, 1 = yes
interval *= 1000;

var image_index = 0;
image_list = new Array();
image_list[image_index++] = new imageItem("../img/image-cycler/01.jpg");
image_list[image_index++] = new imageItem("../img/image-cycler/02.jpg");
image_list[image_index++] = new imageItem("../img/image-cycler/03.jpg");
image_list[image_index++] = new imageItem("../img/image-cycler/04.jpg");
var number_of_image = image_list.length;
function imageItem(image_location) {
this.image_item = new Image();
this.image_item.src = image_location;
}
function get_ImageItemLocation(imageObj) {
return(imageObj.image_item.src)
}
function generate(x, y) {
var range = y - x + 1;
return Math.floor(Math.random() * range) + x;
}
function getNextImage() {
if (random_display) {
image_index = generate(0, number_of_image-1);
}
else {
image_index = (image_index+1) % number_of_image;
}
var new_image = get_ImageItemLocation(image_list[image_index]);
return(new_image);
}
function rotateImage(place) {
var new_image = getNextImage();
document[place].src = new_image;
var recur_call = "rotateImage('"+place+"')";
setTimeout(recur_call, interval);
}
//  End --&gt;
&lt;/script&gt;
&lt;/HEAD&gt;

&lt;!-- STEP TWO: Insert the onLoad event handler into your BODY tag  --&gt;

&lt;BODY OnLoad="rotateImage('rImage')"&gt;

&lt;!-- STEP THREE: Copy this code into the BODY of your HTML document  --&gt;

&lt;center&gt;
&lt;img name="rImage" src="../img/image-cycler/01.jpg" width=120 height=90&gt;
&lt;/center&gt;

 

&lt;!-- Script Size:  2.29 KB --&gt;</textarea><br><font FACE="helvetica,arial,geneva"></font></td></tr>

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